Malignant Optic Nerve Teratoid Medulloepithelioma

**Semantic type:** Neoplastic Process

**Definition:** A rare malignant embryonal neoplasm that arises from primitive medullary epithelium and affects the optic nerve. It contains heterologous elements, particularly cartilage, skeletal muscle, and brain tissue, and usually occurs in boys.

**Synonyms:** - Optic Nerve Malignant Teratoid Medulloepithelioma